Coats & Clark Professional All Purpose Thread is a medium weight thread perfect for hand or machine sewing. It is 100% corespun polyester and can be used to sew all fabrics- knit or woven, natural or synthetic. This 3000 yard high-volume king spool provides consumers six times the yardage of the largest conventional spool you can spend more time doing what you love due to less down time changing out empty spools.